Abstract: In this letter, we report a compact, low-power laser diode-pumped, all-fiber
polarization-entangled photon pair source based on periodically-poled silica
fiber technology. The all-fiber source offers room-temperature, alignment-free,
turn-key operation, with low power consumption, and is packaged into a fanless,
portable enclosure. It features a broad biphoton spectrum of more than 100nm
with a concurrence that is greater than 0.96 for polarization entanglement. The
source is stable over at least 10 hours of continuous operation, achieving
coincidence-to-accidental ratios of more than 2000 consistently over this time
period.